Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C25 · Schur multiplier (H2) = C28 |
| direct product | C2×#65834 |
| Sylow | C5 ⋊ C2×#544 |
1080 conjugacy classes of subgroups; only the 565 normal subgroups are shown.
This group has 1080 conjugacy classes of subgroups — too many to draw. Only its 565 normal subgroups are shown.
Dotted edges: containments with no intermediate normal subgroup — omitted non-normal subgroups may lie between.
| transitive degree | μt(G) = 320 |
124 conjugacy classes — view the full character table.
| maximal subgroup of | #11991116, #11991119, #12008236, … |
| maximal normal subgroup of | #11991116, #11991119, #12008236, … |
| maximal quotient of | C2×#10613887, C2×#10613888, C2×#10605065, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 19688);